Barber&#39;s chair.



A. L. UNDELAND.

BARBER/3' CHAIR. APPLICATION FILED NOV. 22, 1912.

Patented Nov. 10, 1914.

3 SHEETS-SHEET 1 Andrew L Unde an d r awuamkq @M a 6M A. L. UNDELAND.

BARBERS OHAIR.

APPLICATION FILED NOV. 22, 1912.

A. L. UNDELAND.

BARBERS CHAIR.

APPLICATION FILED NOV. 22, 1912 1 1 515 Patented Nov. 10, 1914.

a SHEETS-SHEET 3.

Andrew L. Undeland.

onions.

ANDRE? L UNDELAND, OF OMAHA, NEBRASKA.

BARBEBS CHAIR.

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Appfioation filed November .Eipeoification of Letters Patent.

rat-eaten iiov. i ioii.

Serial No. 733.015.

Be it known that T, .iirinnnw L. llIZDE- LAND, a citizen of the UnitedStates, and a resident ot (,lmaha, in the county of Douglas ant State ofNebraska, have invented certain. new and useful lm jn'ovements inlfiarbers Chairs, of which the lollmving is a specification.

My invention relates to chairs of the class employed by harbors,dentists, etc. and particularly to those in which the raising andlowering of the chair are coi'itrolled by hydraulic pressure.

It is the object of iny'invcni'iim to provide a simple, durable andrelatively inexpensive mechanism for operating such chairs, themechanism being such that the raising, lowering revolving und'recliningmay all be controlled by'a sii'igle operating lever.

Constructions embodying my invention are illustrated in the accompanyingdrawings, in whichliigure 1 is a side view oi? a chair proviifled withthe improved mechanism a portion of the scat-base being broken away toshow the. recline-clamp, Fig. 2 is a vertical sectional view of theoperating inechanisunthe section being transverse to the operatingshaft,Fig. is a vertical section through the axis oi. the operatingshailt,Fig. i is a detail section in the same plane as Fig. 3, Fig. 5 is adetail section in the same plane as Fig. 2 Fig. 6 is a detail side viewof "the recline-clamp, Fig. 7 is an end view of the same, Fig. 8 asection thereof on the axis oi? the lock-rod, Fin. 9 is a detail of oneof the parts of the clamp, Fig. 10 is a detail section of thepump-piston and a part of the 'ilunger, the parts being in the sameposition as in 4 but the plane of section being at right angles thereto,Fig. '11 is a horizontal section of the plunger at the locking-plug, andFig. 12 is a horizontal. section of the piston-and plunger, on the planeof the lines m-m of i and 10. y

The chair illustrated in Fig. 1 is of the type ordinarily used bybarber's, and has a suitablebase 1 with a column 2 inclosingthehydraulic cylinder which is movable vertically and rotatably -within thecylinder, supports the chair-seat 5, To the seat frame are pivotallyconnected the back 6 and foot-apron 7, and these are pivotally connectedwith opposltc ends of the arm-rests 8, so that in recliningthe chairthey move simultaneously toward 1 The plunger 4-, i

a. horizontal position. The recline lock-rod 9 is pivotally connectedwith the footnpron, as shown, and extends rearwardly through a clampingdevice disposed at the side of he plunger-head 10 and carried on theendportion otthc crank-shaft 11. The crankshaft is rotatably mounted inthe plungerhead, and at the end opposite the clamping device arries theoperating-lever 1:2. On "the central part of the shaft is secured acrank 13, and a connecting-rod it extends :trom the cranl'epin downthrough the plunger and is pivotally connected with the slotted head 15of the pump pistoirrod 16. The piston 17 fits slidably within the boreof the plunger and is fixedly secured upon the ]).il-;il()11l0tl, beingheld against a shoulder thereon by means of a nut 18 screwed upon thereduced portion of the rod. portion oi 'the piston-rod between thepiston and the rod-head 15 passes slidably through a cylindrical body 19which [its slidably within the bore of the plunger and serves as a guidefor the piston-rod, as well as for certain other purposes to behereinafter de scribed. A. pin 20 secured to the piston extends upthrough the body 19 and servesto prevent rotation thereof about thepiston rod, while" permitting}; relative longitudinal movement of saidparts. The piston has sevoral vertical ports through it, which arenormally closed by the plate-valve 21 the latter being held yieldablyagainst the bottom of the piston by means of springs 22 placed aroundstuds 23 which are secured to the piston and extend through openings inthe va1veplate, as shown in Fig. 1-. Upon the bottom of the plunger issecured a head 24 which has an opening therein normally closed by avalve The valveis pushed yieldingly upward by a spring 26 of whicharranged as shown, tlie valve having a downwardly extending; stemthereon which passes crossbar.

lVhen the parts are in the positions shown in Fig. 2 the piston is atits highest position relative to the plunger. and the operatinglever isat its extreme forward position, or so that the center-line of the leveris on the dotted line a of said 2. From this position the lever may bemoved rearwardly, past the positions 7), 0, (Z and o to the extrenierearward position f, at which the piston will. be at its lowest positionrelative to The the lower end bears against a. cross-bar 27,

through the spring and is guided in the proaching the latter position apin integral with the pistmi-rol and entending bethe clamping device orrecline-lock to permit the chair to be tilted to various posi tions.

In the side of th: plunger is a radial lugs. On the upper clamp-part 36is an low the nut 18, engaees the, valve 5 and cylindrical opening iiiwhich is slidably dispushes it downward tlii'ztlllwt the spring 26 poseda cylindrical plug 33 of which the so that the valve held open, At aboutthe outer end is rounded so as to lit against thev same time that thevalve begins to be opened wall of the cylinder 3, and its inner end isthe upper edge of the pist n passes below beveled or inclined toward thelower ide the upper end of a bypass groove 99 formed The plug isretained in position by means in the wall of the plunger near the headQl. of a circular spring B l which lies in a cir- When in this no. tionthe liquid in the cylcumferential groove in the outer surface of indcr.5 may pass through the valve J) into the plunger, and of which the endsenter rethe plan; er below the piston, thence through cesses in thesides of the plug. as shown in the b pa s groove and above the piston,Fig. 11. On the side of the body 19, and at thence through one otl'twotransverse ports a position thereon coincident circumferen- 30 in the.body 19, and upward through one tially with the plug, is a beveled face35 of two vertical ports Si termed in said body which is adapted to fitagainst the beveled and connecting with the ports 30, as shown inner endof the plug Then the operin Fig. 10. A pas; being thus completedating-lever moved to the extreine forward from the cylinder to theinterior of the plunposition a, and the piston thus raised to its gerabove the pisirn, the weight of the chair highest position relative tothe plunger, the may force the plunger down into the cylinsaid beveledt'ace engages the plug and der until the plunger-head engages the seatforces it outwardly so that it presses agaihst therefor at the top ofthe cylinder, as shown the side of the cylinder 3. The plunger at inFig. 3. 'When the operating-lever is moved tie same time is pressedagainst the opposite 9 forwardly beyond the position 0 the piston sideof the cylinder and is thus securely is raised toaposition such that theupperedge held against rotation the-rein. After the thereof is above theby-pass groove 29, and body 19 has been-raised to a position such thepin 28 passes out of engagement with the that it will operate the plug33, it will tend valve 25, allowing the valve to close. Conto remain insaid position on account of the tinned upward moven'ient of the pistonthen frictional engagement between it and the causes the plate-valve- 21to open and the walls of the plunger and'end of tilt plug. liquidv inthe upper part of the plunger to However, when the operatingdever. movedpass down through the ports 31 in the body rearwardly to the position 0the piston and 19, and through the valve-ports into the piston-rod aremoved downwardly to the space below the piston. Downward movepositionshown in Fig. at which the head ment of the piston will then force theliquid 15 of, the piston-rod engages the body 19 through the valve 25into the cylinder 3 and by pressing the same downwardly re1 below theplunger so that the plunger will leases it from engagement with thelock- 1 be thereby forced upwardly in the'cylinder. plug. Thus, movementof the lever to the- The chair is thus elevated by oscillating theposition (rcauses the plunger to be locked operating-lever between thepositions (Z and and held against rotation in the cylinder,

6 shown in Fig. 2, and is lowered by moving and after being locked thesame is retained the lever rearwardly beyond the position a. as longasthe lever is not moved rearwardly YVhen the lever is at the position (Zthe piston beyond the position a. is at the position shown in Fig. 5 andthe lhe clamping device for the recline lock lower edge thereof passesabove the lower rod is shown in detail in Figs. 6 to 9, incluedge of theports 32 which are formed in the sive'. The clamp device has an upperpart sides of the plunger-and coincide circumfer- 36 and a lower part 37which fit around the entially with the ports 30 in the body 19.respective sides of the rod 9, and are pivot- During any movement of thepiston above ally connected with each other by a pin 38 the positionshown in Fig. 5, the said ports extending parallel to the rod. At theside 32 and the ports 30 and 131 form a by-pass opposite the pivot-pinstuds are around the piston, so that no pumping acscrewed into lugs onthe lower part 37 and tion can occur. Thus the movement of the extendupward through corresponding lugs operating lever in either directionbetween on, the upper part 36. Helical springs l0 are the positions (Zand a will neither raise nor disposed around said studsbeing normallylower the chair, and such movement may be under compression and pullingthe clamp designated as the dead-stroke or the lever parts toward eachother so that they fricand piston, with reference to the pumpingtionally'engage and clamp the rod 9. Lugs action. The said dead-strokeof the operatd1, integral with the lower clamp part 37, ing-lever isutilizedfor locking the plunger extend upwardly therefrom on opposite toprevent rotation thereof in the cylinder, sidesof the rod 9, and theshaft 11 passes for releasing the same, and for releasing 'revolublythrough the upper parts of said arch-portion 42 .which straddles theshaft 11 between the lugs ell. 'lhrough the upper end of saidarch-portion is passed an adjustingscrew 4-3 provided with a loclenutit, and of which the lower end is rounded and engages the rocking-block45. The rocking-block is retained Within the H1'Cll-}')01tl()fl 42 bymeans of a pin 4.6, which passes loosely through a transverse opening inthe block, and of which the ends are secured in the arch. The

block is normally pushed toward one side shaft corresponding to movementof the.

operating-hwer between the positions Z) and f, the rocking-block is notmoved, but the lever is moved forwardly at about the position I) thehigher part of the cam-surface engages the rocking-block and rolls ittoward the opposite side of the .arch from its normal position. At thesame time the block is slightly raised and spreads the clamp-.

parts 36 and 37 by pressing upwardly on the arch-portion of the part 36while the shaft presses downwardly on the part 37. A very slightspreading of the clamp-parts is suflicient to enable the rod 9 to slidethrough them and the inclination of the chair to be varied. The exactpositionoi the operating lever at which the clamp will be released'aries somewhat, owing to the variation in the position of the rod 9relative to the shaft 11, as will be apparent by reference to the dottedlines in- Fig. 1. The rolling movement of the block 4-5 reduces to aminimum the wear of the cam surface on the shaft, and by adjustment ofthe screw 43 any Weinmay be compensated or vthe parts adjusted so thatthe spreading of the clamp will be properly timed with relation to themove ment of the shaft.

From the foregoing it will be obvious that the entire-control of thechair movements may be readily effected by means of the oneoperating-lever and without the use of other rods, catches or releasingdevices. The chair may be raised or lowered to the desired height, thenrotated tothe desired position and secured in said position by pushingthe lever forward to the extreme position. At the same time that thechair is locked against rotation the recline-clamp is released and thechair may be inclined to the proper or de sired position. The lever isthen moved rearwardly to permit the closing of the re cline-clamp andthe chair will then be held in .the desired position. until the lever isagain moved. Should it be desired to again change the inclination of thechair without releasing ittor rotatiom-thc same may be The lower side ofthedone by again pushing the lever forward.

Should it be desired to rotate the chair without changing theinclination or the height thereof, the lever is moved rearwardly to theposition 0 so as to release the loclz plug, the chair then turned to thedesired position, the lever pushed flt'orward liar enough to again operato the rotation-loclr, and then returned to a position anywhere betweenF) and a. It should be noted that before any elevation or lowering oftheehair can he cllected it is necessary that the recline-clamp he permitted to operate and that the rotation-loch he released. l't is thusimpossible to de'lace the inner surliace oi the cylinder by forciblyraising or lowering the plunger while the locking-plug is held inengagement with the cylinder wall.

New, ha vin g described my invention, what I claim and desire to secureby .Letters Pat cut is: i l

1. In a. chair of the class described, a cyl-- inder, a. hollow plungermovable vertically and rotatably therein, a pui'np-piston reciprocatahlewithin the plunger and adapted to force lluid from the plunger into thecylinder, there'being a bypass to permit fluid to pass around the pistonduring part of its stroke, a locking-plug disposed in the plunger andengageable with the cylinder to prevent rotation of the plunger therein,and a body fitting slidably within the plunger adjoining the piston andactuated by the piston during its movementadjacent to the bypass formoving the locking-plug into engagement with the cylinder and releasingit therefrom.

2. ln a chair of the class described, a cylinder, a plunger movablevertically and rotatably therein, a pump-piston reciprocatable withinthe plunger, a body vertically slidable within the plunger adjacent tothe piston and actuated by movement of the piston beyond predeterminedlimits, and a plug actuatable by said body to hold the plunger againstrotation within the cylinder.

3. In a chair of the class described, a cylinder, a hollow plungermovable vertically and rotatably therein, a plug extending and movableradially through the wall of the plunger, an annular flexible retainingmember having its ends engaging the plug and lying within a grooveextending around the plunger, and means for moving the plug outwardly toengage it with the cylinder.

4. In a chair of the class described, a cyl inder, a'hollow plungermovable vertically and rotatably therein, a pump-piston movable withinthe plunger, an operating shaft connected with the piston forreciprocating the same, a body slidably connected with the piston andfitting within the plunger adjacent thereto, a plug movable radially ofthe plunger to engage the cylinder and lock the plunger therein, thesaid slidable body being engageable with the plug to actuate the same,the body being actuated by movement of the piston beyond predeterminedlimits, a recline locking device, and means on the operating shaft forreleasing said device when the shaft turned so as to move the piston andthe slidable body to engage the latter with the plug,

5. lira chair of the class described, a cylinder, a plunger movablevertically and rotatably therein, a piston slidably disposed ithin theplunger, a piston-rod secured to said piston, a guide-body fittingslidably within the plunger adjacent to the piston and around thepiston-rod, there being abutinents carried by the piston-rod to limitrelative movement of the piston and said guide body, a crankshaftcarried on the plunger and connected with the piston rod, valvesarranged on the piston and in the end of the plunger to control thepassage of fluids through the same, whereby reciprocation of the pistonwill force fluid from within the plunger above the piston into thecylinder below the plunger, means on the piston for holding open thevalve in the plunger, means forming a by-pas's around the piston at eachend of its stroke, means actuated by the guide-body for holding theplunger against rotation within the cylinder, a re cline lock device,and means on the crankshaft for releasing said device.

6. In a chair of the class described, the combination with a cylinder, aplunger fitting slidably and rotatably therein, a piston fitting withinthe plunger, a crank-shaft connected with the piston, valves carried bythe piston and plungervand controllable by pistenmovements to raise andlower the plunger in the cylinder, a recline-lock, and

means on the crank-shaft for releasing said lock, of a guide-bodyfitting slidably Within the bore of the plunger adjoining the piston,

a plug extending through the wall of the plunger'and actuatab'le by saidguide-body to engage the cylinder and prevent rotation of the plungertherein, and means including the piston engageable with said guide-bodyto move it into and out-of engagement with the plug, said means beingarranged to per init free movement of the piston and crankshaft past thereclinelock-release position while the guide-body is in engagement withthe plug,

7. In a chair of the class described, the combination with a cylinder, aplunger working therein, a piston working in the plunger, operatingmeans for moving the piston relatively to the plunger, means controlledby piston-movements for raising and lowering the plunger in thecylinder, and means enabling a dead-stroke of the piston wherein themovements thereof will not aifect the relation of the plunger andcylinden of a locking-plug carried by the plunger and engagable with thecylinder to prevent relative rotation of the plunger and cy1- inder, aplug-actuating member slidable in the plunger, and-means connecting-saidmember in a limited slidable relation to the piston, so that said memberwill be moved to locking position by movement of the piston to one limitof its dead-stroke, will remain fixed at said locking position duringsubsequent movements of the piston intermediate of the limits of thedead-stroke, and will be released from said locking position only bymovement of the piston to the other limit of its dead-stroke. I

In testimony whereof I have hereunto subscribed my name in the presenceof two witnesses.

ANDREW L. UNDELAND. Witnesses:

D. O. BARNELL, A.. R. MITCHELL.

